US4681569A - IV rate meter - Google Patents
IV rate meter Download PDFInfo
- Publication number
- US4681569A US4681569A US06/715,162 US71516285A US4681569A US 4681569 A US4681569 A US 4681569A US 71516285 A US71516285 A US 71516285A US 4681569 A US4681569 A US 4681569A
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- US
- United States
- Prior art keywords
- housing
- drip chamber
- rate meter
- notch
- rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
- A61M5/1689—Drip counters
Definitions
- IV fluid infusion employs a container, either a bottle or bag of fluid, which has attached to it a cylindrical transparent drip chamber. Within the chamber fluid drips from the container one drop at a time, that is, in drops, not in the form of a stream.
- the flow rate is controlled by controlling the drop rate. This is usually accomplished in one of two ways. In one way the hospital attendant regulates the flow manually by adjusting a roller clamp or other flow restricting devices while determining the drop rate (and thus the flow rate) visually.
- an electro-mechanical device automatically controls the rate by monitoring the drop rate and mechanically adjust a flow restriction element or the speed of a pump mechanism.
- the flow rate is commonly determined by measuring the drop rate frequency and converting it to volume flow rate since the drop size for each IV set is known and is usually stated by the manufacture on the IV set labeling.
- the rate meter of this invention is unique in several features, including its high degree of portability. In the preferred embodiment of the invention it is similar in overall configuration to a large fountain pen and is therefore easily carried in the shirt or coat pocket of a hospital attendant.
- the rate meter of this invention is self-contained; that is, it does not have to be wired to any other energy source, instrumentation, or display.
- the rate meter is characterized by the ease with which it can be placed onto or removed from a drip chamber, its ability to adapt to various diameters of drip chambers, the ease of setting the instrument for various drip sizes, the automatic power down features which eliminate the requirement of an ON-OFF switch, and a circuit and computer program design which minimizes battery consumption by controlling the flow of battery current to the major circuit components through a microcomputer.
- FIG. 1 is a front elevational view of an apparatus which employs the principal of the invention.
- the IV rate meter is shown in the non-use condition, that is, in the condition in which it is carried in the pocket of a hospital attendant.
- FIG. 2 is a top view of the rate meter of FIG. 1 as taken along the lines 2--2 of FIG. 1.
- FIG. 3 is a top view as in FIG. 2 but showing the housing moveable portion slid to the open position so that the rate meter can be attached to a drip chamber.
- FIG. 4 is an end view taken along the line 4--4 of FIG. 1.
- FIG. 5 is an elevational view showing the rate meter positioned on a drip chamber attached to an IV container showing the method in which the invention is employed to provide a read-out of the fluid flow rate of IV fluid being dispensed from the container.
- FIG. 6 is a diagrammatic view of the arrangement of the light emitters and the photodetector employed in the rate meter for detecting the passage of a drop of fluid passing through the drip chamber.
- FIG. 7 is a block diagram of the circuit employed in the rate meter.
- FIG. 8 is a flow chart of a portion of the computer program as employed in the rate meter illustrating the automatic OFF features of the program.
- FIG. 9 is a flow chart of a portion of the computer program showing the drop size setting routine, that is, the routine which establishes an input to the program of the drops per milliliter according to the fluid administration system with which the rate meter is being employed.
- the rate meter of this invention is for use with an intravenous fluid administration system such as illustrated in FIG. 5.
- the rate meter is generally indicated by the numeral 10 and is shown affixed to a cylindrical, transparent drip chamber 12 which is attached to or formed as a part of an intravenous solution container 14. Fluid flows from container 14 as a sequence of drops passing vertically downwardly through the transparent drip chamber 12 and by tube 16 to intravenous injection into a patient.
- the rate of flow of fluid is determined by two factors, that is, the number of drops per minute, and the volumetric size of each drop.
- Manufacturers of intravenous administration systems produce equipment having varying drop sizes according to the nature of construction of the equipment. The drop size characteristic of each piece of equipment is furnished by the manufacturer, and frequently is printed on labels affixed to the apparatus.
- a unique aspect of the invention is that the rate meter 10 is of compact configuration, and can be approximately the size of a large fountain pen to be easily transported by hospital personnel in a shirt or coat pocket.
- the unit is completely self-contained and is not connected to an extraneous energy source nor to outside instrumentation.
- the device consists of an elongated housing 18 having a first end 18A and a second end 18B.
- the housing is rectangular, and more precisely, square in cross-sectional configuration, although the housing is not limited to such geometrical arrangement and may be of other cross-sectional shapes, such as circular.
- the housing 18 includes a notch 20 intermediate the ends 18A and 18B, the notch extending only partially through the width of the housing and being dimensioned so as to freely receive the largest drip chamber to which the device is designed to be used.
- housing 18 includes a display window 22, typically closed with a transparent material and providing view of a liquid crystal display 24 which reveals during normal operating condition, the rate of the fluid flow such as in milliliters per hour.
- the display is also used to reveal drop size information and other indications as will be set forth hereinafter.
- the housing 18 includes a fountain pen type clip 26 so that the user may clip the rate meter to a shirt or coat pocket.
- the end 18B as shown in FIG. 4, includes a slide out cover which serves as a means of replacing a battery 30 contained in the instrument.
- a slideable portion 32 Received on housing 18 is a slideable portion 32 which, as shown in FIG. 4, is of C-shaped cross-sectional configuration for ease in assembly onto the housing.
- One end 34 of slideable portion 32 has a semi-circular shape (best illustrated in FIGS. 2 and 3) which complements the opposed portion of notch 20.
- the primary function of the housing sliding portion 32 is to retain the rate meter in position on a drip chamber.
- An integral boss portion 36 extends within housing 18 and is engaged by a compression spring 38 so that the sliding portion 32 is urged in the direction towards housing end 18A.
- To secure the rate meter onto a drip chamber the housing portion 32 is slid in the direction towards housing end 18B, as shown in FIG. 3. The device is then positioned so that a drip chamber is received in notch 20.
- buttons switch 40 as seen in FIG. 1.
- This switch is used as one of its purposes, for setting the instrument to respond to the drop size of the equipment with which it is used.
- the rate meter functions to measure flow rate of an IV administration system by detecting each drop of fluid as it falls downwardly through the drip chamber. This is accomplished by transmitting light beams across the drip path and detecting aberations in the light received as affected when drops pass through light beams.
- First and second light emitters 42 and 44 are positioned within the housing, on one side of notch 20.
- a photodetector 46 is positioned on the opposite side of notch 20 to receive the light beams 42A and 44A from the emitters.
- the light emitters and photodetector are arranged in a horizontal plane. As shown in FIG. 6 (a diagrammatic arrangement of the light emitters and photodetectors), the light emitters are spaced apart from each other so that the beams 42A and 44A are at an angle A to each other. This arrangement gives a broader horizontal area for detecting the presence of a fluid drop as it passes through the drip chamber, as compared with a use of a single photo emitter.
- the use of two photo emitters has other advantages as will be set forth hereinafter.
- the spacing between the first light emitter 42 and photodetector 46 is D 1 , with the light beam 42A being coincident the axis of maximum optical sensitivity of the photodetector.
- the second light emitter 44 transmits a beam 44A which is at an angle A from the axis of maximum sensitivity of the photodetector.
- the quantity of light from emitter 44 is equalized with that from first light emitter 42. It can be seen that as the angle A increases, the ratio of D 2 to D 1 decreases.
- D 2 for a selected angle A the same power applied to first and second light emitters 42 and 44 will produce the same voltage signal output on photodetector 46.
- second light emitter 44 can be close to beam 42A since the light emitters do not physically interfere with each other. This arrangement enables the usage of the same circuit components for energizing both light emitters.
- An important feature of the rate meter is that it does not employ an ON-OFF power switch. There are several reasons why it is desirable that the use of an ON-OFF switch be avoided.
- a manual switch requires operation personnel to remember to turn the switch OFF when the instrument is not in use. The chance that the meter will be inadvertently left ON is significant, and therefore the average battery life can be expected to be relatively short. By eliminating the need for the operator to remember to turn On and OFF a power switch, the average useful life of the batteries is improved.
- a power switch when actuated, causes electronic signal bounce. In order to alleviate this problem it is usually necessary to incorporate a debouncing circuit. The need for a debouncing circuit is obviated by eliminating the ON-OFF switch.
- a third reason is that any mechanical power switching device is subject to failure at a rate more rapidly than solid state electronic components.
- a system is employed within the circuit and software to automatically ascertain when the device is not being used to measure a flow rate and therefore to turn it to the "OFF" mode, that is, the condition of minimal power consumption.
- One of the means for accomplishing this is by the use of a shutter, or occluder 48 which is a portion of the housing sliding portion 32.
- the occluder is seen in FIGS. 1, 2, 3 and 7.
- the housing portion 32 is in the open position such as shown in FIG. 3, the occluder 48 is moved to the right so that light beam 44A is unobstructed.
- the device is not mounted on a drip chamber and the slideable portion 32 is in the closed position as shown in FIGS.
- the occluder 48 is moved into the path of light beam 44A, preventing it from impinging on the photo detector 46.
- the occluder 48 is shown in solid outline to indicate its position when the instrument is on a drip chamber and in dotted outline when it is not on a drip chamber.
- FIG. 7 is a circuit diagram of the basic components of the rate meter.
- a microcomputer 50 mounted within housing 18 is a microcomputer 50, an analog signal conditioning circuit 52, a comparator 54, an oscillator 56 and a voltage reference circuit 58.
- Oscillator 56 provides a timing signal in the usual manner.
- the comparator 54 and voltage reference 58 are employed for determining the status of battery 30, that is, to ascertain that the battery 30 provides a sufficient voltage so that a reliable indication of flow rate is attainable.
- a potentiometer 60 is employed during manufacture to set the threshold for the low battery comparator voltage.
- FIG. 8 is a flow chart of the automatic OFF features of the rate meter.
- the flow chart shows the sequence of the program for verifying that the battery voltage is at a preselected level as determined by comparator 54, that the occluder 48 is not obstructed light beam 44A, and that drops have been detected within a preselected maximum time duration.
- the microcomputer removes power from the external circuit elements and enters a low power stop mode according to the following criteria: (a) If the optical assembly is removed from the drip chamber, that is, occluder 48 intercepts light beam 44A; or (b) If the time before energizing the rate meter and placing the assembly on the drip chamber exceeds some nominal time, that is, approximately 15 seconds, which indicates that the rate meter was accidentally energized; or (c) If the rate meter is being used to monitor the IV flow rate and no drops are seen for approximately 50 seconds, the assumption being that the flow of IV fluid through the drip chamber has ceased; or (d) If the rate meter is being used to montior the IV flow rate for longer than approximately 21/2 minutes, the assumption being that the rate meter has been left unattended and need not operate; or (e) If a low battery
- the flow chart of FIG. 9 illustrates the basic software arrangement for setting the drop size in drops per milliliter.
- Switch 40 is depressed, when the program is in the calibration mode, a number of times in order to increment to one of several pre-programmed drop sizes expressed as the number of drops to form a milliliter, which is established by the manufacturer of the IV equipment with which the rate meter is used.
- switch 40 is first depressed while the rate meter was in the OFF mode, the last selected drop size is first displayed as a matter of convenience.
- the software employed in the rate meter is exemplary of microcomputer instructions for practicing the invention employing the basic circuit arrangement of FIG. 7 and the structural features of the invention as has been described.
- the method of detecting the presence of a drop as it passes through a drip chamber and alters the light impinging on optical detector 46 is a well known procedure as revealed in prior published material, such as in the prior issued patents listed in the summary of the invention.
- the invention provides a unique rate meter for monitoring the flow rate of intravnous solutions.
- the rate meter is a small, compact, highly portable device which can be carried in the shirt or coat pocket of a user. It is expeditiously placed onto or removed from a drip chamber without requiring any tools. It is of light weight so as not to require supplemental support and so as not to cause portions of the IV fluid administration system to tend to separate from each other.
- the device includes means of reducing battery current consumption to prolong the life of the internally employed battery and at the same time in a manner which does not utilize an ON-OFF switch.
- the rate meter includes internal arrangements for monitoring its own status and for minimizing power consumption according to the status without requiring input from the user. In general, the rate meter has been herein described to provide a device having convenience and utility exceeding the present commercially practiced state of the art.
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US06/715,162 US4681569A (en) | 1985-03-22 | 1985-03-22 | IV rate meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/715,162 US4681569A (en) | 1985-03-22 | 1985-03-22 | IV rate meter |
Publications (1)
Publication Number | Publication Date |
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US4681569A true US4681569A (en) | 1987-07-21 |
Family
ID=24872902
Family Applications (1)
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US06/715,162 Expired - Lifetime US4681569A (en) | 1985-03-22 | 1985-03-22 | IV rate meter |
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Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4775368A (en) * | 1986-02-19 | 1988-10-04 | Pfrimmer-Viggo Gmbh & Co. Kg | Infusion device |
US4857050A (en) * | 1987-09-23 | 1989-08-15 | Fisher Scientific Company | Ratiometric air-in-line detector |
EP0372457A2 (en) * | 1988-12-02 | 1990-06-13 | SIS-TER S.p.A. | Infusion device |
US5002539A (en) * | 1987-04-08 | 1991-03-26 | Coble Stephen J | IV rate meter |
US5045069A (en) * | 1989-01-17 | 1991-09-03 | Robert Imparato | Portable infusion monitor |
US5088990A (en) * | 1989-08-30 | 1992-02-18 | Hivale Ronald S | I.V. alert system |
US5154704A (en) * | 1990-10-31 | 1992-10-13 | Kent Archibald G | IV clamp with tube clip |
US5592396A (en) * | 1992-08-10 | 1997-01-07 | Ingersoll-Rand Company | Monitoring and control of fluid driven tools |
US5920018A (en) * | 1996-12-11 | 1999-07-06 | The University Of Tennessee Research Corporation | Real time volumetric flow sensor |
US20100309005A1 (en) * | 2009-06-04 | 2010-12-09 | Warner Tod H | Automated intravenous monitoring device |
US7892199B2 (en) * | 2007-05-21 | 2011-02-22 | Asante Solutions, Inc. | Occlusion sensing for an infusion pump |
US8152765B2 (en) | 2007-05-21 | 2012-04-10 | Asante Solutions, Inc. | Infusion pump system with contamination-resistant features |
US8211062B2 (en) | 2007-05-21 | 2012-07-03 | Asante Solutions, Inc. | Illumination instrument for an infusion pump |
USD691258S1 (en) | 2010-05-27 | 2013-10-08 | Asante Solutions, Inc. | Infusion pump |
US20150352278A1 (en) * | 2013-01-23 | 2015-12-10 | Tatsuta Electric Wire & Cable Co., Ltd. | Infusion Speed Measurement Instrument |
US9440021B2 (en) | 2007-05-21 | 2016-09-13 | Bigfoot Biomedical, Inc. | Removable controller for an infusion pump |
US20170307649A1 (en) * | 2014-12-22 | 2017-10-26 | Korea University Research And Business Foundation | Apparatus for measuring fluid speed |
USD809134S1 (en) | 2016-03-10 | 2018-01-30 | Bigfoot Biomedical, Inc. | Infusion pump assembly |
USD836769S1 (en) | 2016-12-12 | 2018-12-25 | Bigfoot Biomedical, Inc. | Insulin delivery controller |
USD839294S1 (en) | 2017-06-16 | 2019-01-29 | Bigfoot Biomedical, Inc. | Display screen with graphical user interface for closed-loop medication delivery |
US10426896B2 (en) | 2016-09-27 | 2019-10-01 | Bigfoot Biomedical, Inc. | Medicine injection and disease management systems, devices, and methods |
US20200240826A1 (en) * | 2019-01-28 | 2020-07-30 | Battelle Memorial Institute | Fluid end of life sensors |
US20210113371A1 (en) * | 2018-02-06 | 2021-04-22 | Nemera La Verpillière | Method for monitoring the dispensing of a drop and assistance device |
US10987468B2 (en) | 2016-01-05 | 2021-04-27 | Bigfoot Biomedical, Inc. | Operating multi-modal medicine delivery systems |
US11096624B2 (en) | 2016-12-12 | 2021-08-24 | Bigfoot Biomedical, Inc. | Alarms and alerts for medication delivery devices and systems |
US11147914B2 (en) | 2013-07-19 | 2021-10-19 | Bigfoot Biomedical, Inc. | Infusion pump system and method |
US11389088B2 (en) | 2017-07-13 | 2022-07-19 | Bigfoot Biomedical, Inc. | Multi-scale display of blood glucose information |
US11464906B2 (en) | 2013-12-02 | 2022-10-11 | Bigfoot Biomedical, Inc. | Infusion pump system and method |
US11471598B2 (en) | 2015-04-29 | 2022-10-18 | Bigfoot Biomedical, Inc. | Operating an infusion pump system |
US11865299B2 (en) | 2008-08-20 | 2024-01-09 | Insulet Corporation | Infusion pump systems and methods |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3449952A (en) * | 1967-05-19 | 1969-06-17 | Amp Inc | Drop-count attachment |
US3563090A (en) * | 1968-09-18 | 1971-02-16 | Basil V Deltour | Drop monitor |
US3596515A (en) * | 1967-11-27 | 1971-08-03 | Ivac Corp | Drop flow sensor and resilient clamp therefor |
US4181130A (en) * | 1977-11-04 | 1980-01-01 | Ivac Corporation | Drop discriminator system |
US4346606A (en) * | 1980-03-10 | 1982-08-31 | Imed Corporation | Rate meter |
US4397648A (en) * | 1980-11-07 | 1983-08-09 | Ivac Corporation | Drop sensing unit and associated drip chamber for IV fluid administration |
US4475905A (en) * | 1982-09-30 | 1984-10-09 | Himmelstrup Anders B | Injection device |
-
1985
- 1985-03-22 US US06/715,162 patent/US4681569A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3449952A (en) * | 1967-05-19 | 1969-06-17 | Amp Inc | Drop-count attachment |
US3596515A (en) * | 1967-11-27 | 1971-08-03 | Ivac Corp | Drop flow sensor and resilient clamp therefor |
US3563090A (en) * | 1968-09-18 | 1971-02-16 | Basil V Deltour | Drop monitor |
US4181130A (en) * | 1977-11-04 | 1980-01-01 | Ivac Corporation | Drop discriminator system |
US4346606A (en) * | 1980-03-10 | 1982-08-31 | Imed Corporation | Rate meter |
US4397648A (en) * | 1980-11-07 | 1983-08-09 | Ivac Corporation | Drop sensing unit and associated drip chamber for IV fluid administration |
US4475905A (en) * | 1982-09-30 | 1984-10-09 | Himmelstrup Anders B | Injection device |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4775368A (en) * | 1986-02-19 | 1988-10-04 | Pfrimmer-Viggo Gmbh & Co. Kg | Infusion device |
US5002539A (en) * | 1987-04-08 | 1991-03-26 | Coble Stephen J | IV rate meter |
US4857050A (en) * | 1987-09-23 | 1989-08-15 | Fisher Scientific Company | Ratiometric air-in-line detector |
EP0372457A2 (en) * | 1988-12-02 | 1990-06-13 | SIS-TER S.p.A. | Infusion device |
EP0372457A3 (en) * | 1988-12-02 | 1990-11-14 | SIS-TER S.p.A. | Infusion device |
US5045069A (en) * | 1989-01-17 | 1991-09-03 | Robert Imparato | Portable infusion monitor |
US5088990A (en) * | 1989-08-30 | 1992-02-18 | Hivale Ronald S | I.V. alert system |
US5154704A (en) * | 1990-10-31 | 1992-10-13 | Kent Archibald G | IV clamp with tube clip |
US5592396A (en) * | 1992-08-10 | 1997-01-07 | Ingersoll-Rand Company | Monitoring and control of fluid driven tools |
US5689434A (en) * | 1992-08-10 | 1997-11-18 | Ingersoll-Rand Company | Monitoring and control of fluid driven tools |
US5920018A (en) * | 1996-12-11 | 1999-07-06 | The University Of Tennessee Research Corporation | Real time volumetric flow sensor |
US7892199B2 (en) * | 2007-05-21 | 2011-02-22 | Asante Solutions, Inc. | Occlusion sensing for an infusion pump |
US9480793B2 (en) | 2007-05-21 | 2016-11-01 | Bigfoot Biomedical, Inc. | Occlusion sensing for an infusion pump |
US8152765B2 (en) | 2007-05-21 | 2012-04-10 | Asante Solutions, Inc. | Infusion pump system with contamination-resistant features |
US8211062B2 (en) | 2007-05-21 | 2012-07-03 | Asante Solutions, Inc. | Illumination instrument for an infusion pump |
US8454575B2 (en) | 2007-05-21 | 2013-06-04 | Asante Solutions, Inc. | Illumination instrument for an infusion pump |
US8647302B2 (en) | 2007-05-21 | 2014-02-11 | Asante Solutions, Inc. | Infusion pump system with contamination-resistant features |
US9962482B2 (en) | 2007-05-21 | 2018-05-08 | Bigfoot Biomedical, Inc. | Removable controller for an infusion pump |
US8834420B2 (en) | 2007-05-21 | 2014-09-16 | Asante Solutions, Inc. | Illumination instrument for an infusion pump |
US8852141B2 (en) | 2007-05-21 | 2014-10-07 | Asante Solutions, Inc. | Occlusion sensing for an infusion pump |
US9717849B2 (en) | 2007-05-21 | 2017-08-01 | Bigfoot Biomedical, Inc. | Occlusion sensing for an infusion pump |
US9440021B2 (en) | 2007-05-21 | 2016-09-13 | Bigfoot Biomedical, Inc. | Removable controller for an infusion pump |
US9474854B2 (en) | 2007-05-21 | 2016-10-25 | Bigfoot Biomedical, Inc. | Occlusion sensing for an infusion pump |
US11865299B2 (en) | 2008-08-20 | 2024-01-09 | Insulet Corporation | Infusion pump systems and methods |
US20100309005A1 (en) * | 2009-06-04 | 2010-12-09 | Warner Tod H | Automated intravenous monitoring device |
US8692678B2 (en) * | 2009-06-04 | 2014-04-08 | Tod. H. WARNER | Automated intravenous monitoring device |
USD691258S1 (en) | 2010-05-27 | 2013-10-08 | Asante Solutions, Inc. | Infusion pump |
US9737661B2 (en) * | 2013-01-23 | 2017-08-22 | Tatsuta Electric Wire & Cable Co., Ltd. | Infusion speed measurement instrument |
US20150352278A1 (en) * | 2013-01-23 | 2015-12-10 | Tatsuta Electric Wire & Cable Co., Ltd. | Infusion Speed Measurement Instrument |
US11147914B2 (en) | 2013-07-19 | 2021-10-19 | Bigfoot Biomedical, Inc. | Infusion pump system and method |
US11464906B2 (en) | 2013-12-02 | 2022-10-11 | Bigfoot Biomedical, Inc. | Infusion pump system and method |
US20170307649A1 (en) * | 2014-12-22 | 2017-10-26 | Korea University Research And Business Foundation | Apparatus for measuring fluid speed |
US10976336B2 (en) * | 2014-12-22 | 2021-04-13 | Absology Co., Ltd. | Apparatus for measuring fluid speed by using the refraction of light emitted from two light sources |
US11471598B2 (en) | 2015-04-29 | 2022-10-18 | Bigfoot Biomedical, Inc. | Operating an infusion pump system |
US10987468B2 (en) | 2016-01-05 | 2021-04-27 | Bigfoot Biomedical, Inc. | Operating multi-modal medicine delivery systems |
USD809134S1 (en) | 2016-03-10 | 2018-01-30 | Bigfoot Biomedical, Inc. | Infusion pump assembly |
US11229751B2 (en) | 2016-09-27 | 2022-01-25 | Bigfoot Biomedical, Inc. | Personalizing preset meal sizes in insulin delivery system |
US10426896B2 (en) | 2016-09-27 | 2019-10-01 | Bigfoot Biomedical, Inc. | Medicine injection and disease management systems, devices, and methods |
US11806514B2 (en) | 2016-09-27 | 2023-11-07 | Bigfoot Biomedical, Inc. | Medicine injection and disease management systems, devices, and methods |
US11096624B2 (en) | 2016-12-12 | 2021-08-24 | Bigfoot Biomedical, Inc. | Alarms and alerts for medication delivery devices and systems |
USD836769S1 (en) | 2016-12-12 | 2018-12-25 | Bigfoot Biomedical, Inc. | Insulin delivery controller |
USD852837S1 (en) | 2017-06-16 | 2019-07-02 | Bigfoot Biomedical, Inc. | Display screen with graphical user interface for closed-loop medication delivery |
USD839294S1 (en) | 2017-06-16 | 2019-01-29 | Bigfoot Biomedical, Inc. | Display screen with graphical user interface for closed-loop medication delivery |
US11389088B2 (en) | 2017-07-13 | 2022-07-19 | Bigfoot Biomedical, Inc. | Multi-scale display of blood glucose information |
US20210113371A1 (en) * | 2018-02-06 | 2021-04-22 | Nemera La Verpillière | Method for monitoring the dispensing of a drop and assistance device |
US20200240826A1 (en) * | 2019-01-28 | 2020-07-30 | Battelle Memorial Institute | Fluid end of life sensors |
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